CASE Construction W26 Wheel Loader Service Manual 9-78236 English
Brand: CASE Construction Equipment
Product Range: Wheel Loader
Publication Type: Service Manual
Equipment Model: W26
Serial Number: -
Publication Number: 9-78236
Issued: Printed in U.S.A. (Reprinted)
Language: English
Pages: 415
File Format: PDF Document
Additional Information: This manual does not cover the Detroit Diesel engine, excepting routine maintenance items, removal and installation, and adjustment of the throttle linkage and idle speeds. For Engine Repair, See the Engine Service Manual.
Table of Contents
SECTION I ENGINE
INTRODUCTION
Specifications, Serial Number, RH and LH
STALL CHECKS
Combined Converter - Equipment Hydraulic Stall Test
Converter Stall Test
Equipment Hydraulics Stall Test
REMOVING THE ENGINE
INSTALLING THE ENGINE
ADJUSTING IDLE SPEEDS AND THROTTLE CONTROLS
SECTION II ELECTRICAL SYSTEM
SPECIFICATIONS
WIRING DIAGRAM
TROUBLESHOOTING CHART
TROUBLESHOOTING THE STARTING CIRCUIT
BATTERIES
STARTER
STARTER SOLENOID
SOLENOID SWITCH
TROUBLESHOOTING THE CHARGING CIRCUIT
Testing Battery Circuit
Testing Alternator Output on Engine
Testing Alternator Field Circuit on Engine
Testing Field Control Circuit
Testing Regulator Voltage Setting
Adjusting Regulator Voltage Setting
Testing Oil Pressure Switch and Circuit Breaker
SERVICING AND TESTING THE ALTERNATOR
ALTERNATOR BELT ADJUSTMENT
INSTRUMENT PANEL RESISTOR CHECKS
CHECKING AIR PRESSURE WARNING SYSTEM
NEUTRAL START SWITCH ADJUSTMENT
BUCKET HEIGHT CONTROL ELECTRICAL CHECKOUT
RETURN TO DIG ELECTRICAL CHECKOUT
SECTION III TRANSMISSION
TRANSMISSION REMOVAL AND INSTALLATION
SECTION IV DIFFERENTIALS AND PLANETARIES
DIFFERENTIAL TROUBLESHOOTING CHART
DIFFERENTIAL
Removal
Disassembly
Ring Gear Removal and Replacement
Assembly
Adjusting Differential Bearing Preload
Adjusting Ring Gear and Pinion Backlash
Checking Tooth Contact
Lubrication
PLANETARY TROUBLESHOOTING CHART
PLANETARIES
Disassembly
Assem bly
Wheel Bearing Adjustment
Lubrication
DRIVESHAFTS AND UNIVERSAL JOINTS
FRONT DRIVESHAFT CENTER BEARING
SECTION V BRAKES AND AIR OPERATED CONTROLS AND ACCESSORIES
PRESSURIZING/DEPRESSURIZING THE AIR SYSTEM
OPERATING PRINCIPLES
DIAGRAM OF AIR AND BRAKE SYSTEM
AIR COMPRESSOR
Trouble Shooting Chart
Specifications
Removal
Cylinder Head
Cylinder Block and Crankcase
Unloader
Installation
Description
GOVERNOR
TREADLE VALVES
BRAKE ACTUATORS
FOOT BRAKES
Trouble Shooting
Front Wheel Brakes
Rear Wheel Brakes
PARKING BRAKE
RESERVOIRS
SAFETY VALVE
MOISTURE EJECTION VALVE
PRESSURE PROTECTION VALVE
AIR REGULATOR VALVE
DOUBLE CHECK VALVE
CLUT CH CUT-OUT VALVE
AIR HORN AND AIR HORN VALVE
SECTION VI HYDRAULIC SYSTEM
HYDRAULIC DIAGRAM - WITHOUT DEMAND VALVE
HYDRAULIC DIAGRAM - WITH DEMAND VALVE
HYDRAULIC SPECIFICATIONS
PRESSURIZING/DEPRESSURIZING THE HYDRAULIC RESERVOIR
CHECKING PRESSURE SETTING OF LOADER MAIN RELIEF VALVE
CHECKING PRESSURE SETTING OF STEERING RELIEF VALVES
HYDRAULIC OIL DRAIN/REFILL AND RESERVOIR FILTER SERVICE
TROUBLESHOOTING CHART
Oil Supply Problems
Pump Problems
Loader Control Valve Problems
Steering Control Valve Problems
Cylinder Problems
Demand Valve Problems
TROUBLESHOOTING WITH A FLOWMETER
TESTING SECONDARY RELIEF VALVES WITH HAND PUMP
Loader Relief Valves
Hand Pump Test Procedures
STEERING-LOADER HYDRAULIC PUMP
LOADER CONTROL VALVE
Specifications
Removal
Servicing Relief and Check Valves
Servicing the Spools
Installing Valve
Special Tools
STEERING CONTROL VALVES
DEMAND VALVE
LOADER CYLINDERS (INC. TILT AND LIFT CYLS.)
DROTT BUCKET CYLINDERS
STEERING CYLINDERS
SECTION VII STEERING
STEERING HYDRAULIC SPECIFICATIONS
OPERATING PRINCIPLES
STEERING HYDRAULICS TROUBLESHOOTING CHART
STEERING RELIEF VALVE PRESSURE CHECK AND ADJUSTMENT
DEMAND VALVE
STEERING CONTROL VALVE
Used on Machines After S/N 9102941
Used on Machines Before S/N 9102941
STEERING CYLINDERS
STEERING GEAR AND CHASSIS PIVOTS
Trouble Shooting Chart
Trouble Shooting the Steering Linkage
STEERING GEAR LINKAGE ADJUSTMENTS
STEERING GEAR (SERVICING)
UPPER AND LOWER CHASSIS PIVOTS
SECTION VIII LOADER
BUCKET POSITION CONTROL (RETURN TO DIG AND AUTOMATIC ROLLBACK) DESCRIPTION
BUCKET HEIGHT CONTROL DESCRIPTION
BUCKET HEIGHT CONTROL ADJUSTMENTS
BUCKET HEIGHT CONTROL PARTS REPLACEMENT
AUTOMATIC BUCKET ROLLBACK AND RETURN TO DIG ADJUSTMENTS
CHECKING RETURN TO DIG ELECTRICAL COMPONENTS
CHECKING BUCKET HEIGHT CONTROL ELECTRICAL COMPONENTS
REPLACING BUCKET CUTTING EDGES AND TEETH
SERVICING THE DROTT BUCKET
Clam Cutting Edge Removal and Replacement
Blade Cutting Edge Removal and Replacement
Bucket Teeth, Bushings, Grab Hook
SECTION IX MAINTENANCE AND LUBRICATION
SERIAL NUMBER LOCATIONS
LUBRICATION AND MAINTENANCE SPECIFICATIONS
Recommended Lubricants, Fuel, Coolant
Location of Lube Fittings
FUEL
FUEL FILTER AND STRAINER SERVICING
DRY TYPE AIR CLEANER
OIL BA TH TYPE AIR CLEANER
AIR CLEANER RESTRICTION INDICATOR
OIL FILTERS SERVICING
BELTS REPLACEMENT AND ADJUSTMENT
THERMOSTAT REPLACEMENT
TORQUE SPECIFICATIONS